MovieDB

A Kotlin Multiplatform app built with Compose Multiplatform that lets you browse, search, and discover movies using The Movie Database (TMDB) API. Runs on Android and iOS from a single shared codebase.

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Features

Feature	Description
Browse Movies	Paginated grid of popular, top-rated, upcoming, and now-playing movies
Movie Details	Backdrop image, rating, release date, genres, overview, and trailers
Search	Debounced search with inline results as you type
Wishlist	Add/remove favorites persisted locally with swipe-to-delete
Deep Links	Open movies, search, and favorites from external links (Rinku)
Theming	Dynamic Material 3 with dark/light mode support
Cross-Platform	Shared UI and business logic for Android & iOS

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Teaser

Android

iOS

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Tech Stack

Category	Libraries
UI	Compose Multiplatform 1.10.3, Material 3, Navigation Compose
Networking	Ktor 3.4.2 (OkHttp / Darwin engines), kotlinx-serialization
Image Loading	Coil 3 (ktor3 network engine)
Database	Room 2.8.4 with sqlite-bundled
Dependency Injection	Koin 4.2.1 (annotations + KSP + Koin Compiler)
State Management	Coroutines, StateFlow, MVI pattern (BaseViewModel)
Architecture	Clean Architecture (data/domain/feature layers)
Logging	Kermit 2.1.0
Deep Links	Rinku 1.6.0
Build Config	BuildKonfig 0.18.0
CI	Bitrise + GitHub Actions
Crash Reporting	Firebase Crashlytics
Analytics / Performance	Kotzilla 2.0.8
Linting	Detekt 1.23.8
Coverage	Kover 0.9.8
Dependency Audit	Popcorn Guineapig 3.1.7

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Architecture

Clean Architecture + MVI

The app follows Clean Architecture with strict module dependency rules enforced by Popcorn Guineapig:

composeApp (UI orchestrator)
  │
  ├── feature:*      → depends on domain, designsystem, platform
  ├── domain         → LEAF — pure business logic, no project dependencies
  ├── data           → depends ONLY on domain (implements repository interfaces)
  ├── designsystem   → LEAF — no project dependencies
  └── platform       → LEAF — no project dependencies

Data flow:

UI (Screen composable)
  → ViewModel (intent → state via StateFlow)
    → UseCase (business logic)
      → Repository interface (domain layer)
        → MoviesDataRepository (data layer)
          → ApiService (Ktor → TMDB API)
          → FavoriteMoviesDAO (Room → SQLite)

Navigation

Route	Screen
/movies	Main movie grid with category filter tabs
/details/{movieId}	Movie detail page
/search	Search screen
/wishlist	Favorites list

Deep links via Rinku: movie/{id}, search?query=, favorite

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Project Structure

src/
├── composeApp/              # NavHost, DI aggregator, RootApp
├── data/                    # ApiService, DTOs, DAOs, DatabaseProvider, Mappers
├── domain/                  # Domain models, Repository interfaces, UseCases
├── designsystem/            # Theme, Colors, shared UI (cards, toolbars, icons, AsyncImage)
├── platform/                # Navigation, PagingController, BaseViewModel, Logging, VideoPlayer
├── feature-movies/          # Movie grid with filter tabs + pagination
├── feature-details/         # Movie detail (backdrop, rating, favorite, info)
├── feature-search/          # Debounced search with results
├── feature-wishlist/        # Favorites list with swipe-to-delete
├── androidApp/              # Android entry point (Application, MainActivity)
├── iosApp/                  # Xcode project
└── build-logic/             # Convention plugins (KMP, Koin Compiler, Popcorn GP)

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Getting Started

Prerequisites

• Android Studio (latest stable)
• Xcode (latest stable) — for iOS
• JDK 21
• A TMDB API key (see below)

Setup

1. Clone the repository

   git clone https://github.com/gabrielbmoro/MovieDB-App.git
   

2. Open in Android Studio
   • File → Open → select the src/ directory
3. Get a TMDB API token
   • Create an account at themoviedb.org
   • Copy your Bearer token
   • Add it to src/local.properties:

     MOVIE_DB_API_TOKEN=your_bearer_token_here
     

4. Run the app

   Platform	Instructions
   Android	Select the androidApp run configuration in Android Studio and hit Run
   iOS	Open iosApp/iosApp.xcodeproj in Xcode, build, and run on a simulator

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Contributing

Contributions are welcome! Please check the Contributor Covenant Code of Conduct and our contribution guidelines.

• Report issues: GitHub Issues
• Submit PRs: Open a pull request with a clear description of your changes
• Wiki: See the project Wiki for more documentation

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License

This project is licensed under the MIT License — see the license file for details.